自动添加和删除用户

#!/bin/bash

#

#添加10个用户user1到user10,密码同用户名：但要求只有在用户不存在的情况下才能添加;

#删除10个用户user1到user10

if [ $# -lt 1 ];then

echo "Usage:`basename $0` ARG"

exit 7

fi

if [ $1 == add ];then

for I in {1..10};do

if id user$I &> /dev/null

then

echo "the user$I exist."

else

useradd user$I && echo "user$I" | passwd --stdin user$I &> /dev/null

echo "add user$I success."

fi

done

elif [ $1 == del ];then

for I in {1..10};do

if id user$I &> /dev/null

then

userdel -r user$I

echo "delete user$I ."

else

echo "the user$I not exist."

fi

done

else

echo such as user

fi